The following 4 films in the archive contain 6 sales-promotion films to be shown to Chevy dealers & salesmen.

The films were produced in very late 1965 to introduce the "Impact '66" sales event for the months of March & April 1966.

Edit: Here's an Apacheland webpage describing Lorne Greene's appearance on Oct 26th & 27th of 1965 for this filming:
http://www.apacheland.com/filmography/tv-serials-commercials/general-motors.html

Clip 1 (this one)
http://archive.org/details/0689_Impact_66_01_01_01_00

Shotlist
(First half of segment 1- comparison of Ford & Chevy sports cars)
00:05 Opening cartoon to introduce the Impact '66 event
02:50 Lorne Greene at Apacheland Studios, SE of Apache Junction AZ
05:45 GM Proving Grounds, Milford MI - 1966 Thrill of The Year Show
10.38 Lorne Greene at Apacheland Studios, SE of Apache Junction AZ
11.23 Ft. Macon GA - Filming of a TV Commercial
14:07 Lorne Greene at Apacheland Studios, SE of Apache Junction AZ
15:04 Presentation of the 396 CU Turbojet V8 Engine
17:02 GM Proving Grounds, Mesa AZ
17:12 Oak Creek Canyon Area around Sedona AZ - Partial line of Chevys
18:29 Lorne Greene at Apacheland Studios, SE of Apache Junction AZ
19:51 end of first half of Segment 1

Clip 2
http://archive.org/details/0689_Impact_66_01_21_06_00

Shotlist-
(Second half of Segment 1- comparison of Ford & Chevy sports cars)
00:05 Man playing guitar & singing about a Ford car (The Mustang)
01:55 Red Ford Mustang Fastback driving on US60 SE of Apache Junction AZ
02:18 Black Ford Mustang and Red Chevy Corsair on hills around Jerome AZ
03:27 Red Ford Mustang Fastback & Silver Chevy Corvette on US60 SE of Apache Junction AZ
03:54 Family & Luggage trying unsucessfully to fit into a Black Ford Mustang
04:23 Family & Luggage fits OK in a Silver Chevy II & Corvair
04:42 Race between Ford Mustang, Chevy II & Chevy SS 396 at Mesa Proving Grounds AZ
05:16 Card game & guitar player extolling virtues of Chevy cars
06:47 end of Segment 1

(Start of Segment 2 - Comparison of Ford & Chevy station wagons)
06:48 Lorne Greene at Apacheland Studios, SE of Apache Junction AZ
09:02 Chevy, Ford & Plymouth station wagons in various Mesa AZ locations
12:30 audio fades considerably through end
13:03 fullscreen ad graphics with text
14:46 Lorne Greene at Apacheland Studios, SE of Apache Junction AZ
15:44 end of Segment 2

(Start of Segment 3 - Comparison of Chevy & Ford performance cars (Dr. No themed))
16:08 Man drives dilapidated car that explodes.
16:42 Man (James Bland) meets Dr. Yes
17:39 Roadside motel, probably east Mesa AZ
18:14 Dr. Yes shows Chevelle 396, Ford Fairlane GT, Pontiac GTO
20:24 Go-go dancer in cage (wake-up you salesmen!)
21:47 Brake & acceleration tests of Chevy SS 396. Fairlane GT & GTO at Mesa Proving Grounds
24:19 end of Segment 3

(Start of Segment 4 - Comparison of Chevy & Ford vans & pickup trucks)
24:20 Chevy El Camino & Ford Ranchero at Apacheland Studios, SE of Apache Junction AZ
26:53 Chevy El Camino & Ford Mustang at Mesa Proving Grounds AZ
27:38 Chevy & Ford vans on Apache Junction and Mesa AZ streets
29:53 Chevy & Ford pickup trucks with campers
33:34 end of Segment 4


Clip 3
http://archive.org/details/0691_Impact_66_02_02_40_00

Shotlist-
(Start of Segment 5 - Comparison of Chevy & Ford reliability, quality & economy)
00:05 Chevy II in various desert scenes
01:00 Chevy II taxi fleet in San Diego
03:38 Demolition Derby
04:38 Junk Yard (statistics that show more Fords than Chevys get scrapped)
05:42 Chevy Caprice on country road
06:16 Chevy cars in Mesa AZ area showing ride, quality, economy & price
14:43 end of Segment 5

Clip 4
http://archive.org/details/0691_Impact_66_02_17_49_00

Shotlist-
(Start of Segment 6 - Sales & Promotion awards)
00:05 Man describes Chevy superiority
01:17 Man announces March & April sales promotion & Double Dividend Days
02:45 Man announces rewards to be earned by salesmen- Acapulco trip, merchandise, etc.
05:23 Man announces advertising efforts to support sales
07:10 Lorne Greene at Apacheland Studios, SE of Apache Junction AZ (summarizes pitch)
08:10 Closing cartoon for Impact '66
08:39 end of Segment 6

The last two parts (Clips 3 & 4, Segments 5 & 6) were posted years ago on this site as:
http://archive.org/details/impact_66_1
and
http://archive.org/details/impact_66_2
Check out the many comments there.